JPH0618452B2 - End treatment device for coated electric wire - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an apparatus for performing an end treatment on a covered electric wire such as a power cable or a communication cable whose circumference is covered with a covering, and more specifically, the above-mentioned apparatus. The present invention relates to a device for peeling off an end coating of a coated electric wire over a predetermined width.

[Conventional technology]

As is well known, the coating of the covered electric wire is composed of a synthetic resin layer, a rubber layer, or the like, and when connecting the covered electric wire, it is necessary to first peel off the end coating to expose the electric wire.

Conventionally, in most cases, the work of peeling off the end coating is performed manually using a tool such as pliers.

Further, there is an end treatment device of a type in which a spiral cut is made in the end coating and the coating is spirally peeled off along the cut.

[Problems to be solved by the invention]

However, the manual peeling work of the end coating is cumbersome and inefficient, and although it requires a great deal of labor and heat kneading, the finished state varies from person to person, and the subsequent wiring work is considered. In this case, there is a problem that the finish is not always proper.

In addition, although the efficiency is improved to some extent by using the conventional edge processing device as compared with the case of manual work, the coating is torn in the middle of being spirally peeled off, and a defective product is often generated. There was a problem.

This invention solves the above problems, it is possible to efficiently perform the peeling work of the end coating with almost no manual work, and the frequency of defective products is low,
It is an object of the present invention to provide an end treatment device for a covered electric wire that can obtain a uniform finished state.

[Means for solving problems]

In order to achieve the above object, an end treatment device for a coated electric wire according to the present invention is configured such that an end width of the covered electric wire is brought into contact with an end surface of the covered electric wire inserted into an insertion port into which the end portion of the covered electric wire is inserted. Of the insertion width regulating tool for regulating the position of the covered electric wire, the chuck mechanism for abutting at a plurality of circumferential positions of the covered electric wire inserted into the insertion port to position the covered electric wire, and the covering of the covered electric wire positioned by the chuck mechanism. A creasing mechanism that forms cuts in the axial direction at a plurality of positions in the circumferential direction, and the coating from the cuts as a starting point by sandwiching between the cuts formed at a plurality of positions of the coating and pulling outward. With a coating tearing mechanism that tears off in the axial direction while tearing,
In the creasing mechanism, the movable member that holds the cutter blade in a protruding state reciprocates between the forward position where the blade edge of the cutter blade sticks to the coating of the coated electric wire and the retracted position where the blade edge is pulled out of the coating. A guide member is provided on both sides of the cutter blade so as to be slidable relative to the cutter blade, and the tip of the guide member is forward of the blade edge of the cutter blade. A direction in which the tip of the guide member is connected to the movable member in a movable state between the protruding position and the position retracted rearward of the cutting edge, and the tip of the guiding member protrudes forward of the cutting edge between the movable member and the guiding member. An elastic member that elastically urges to is interposed.

[Work]

In the end treatment device for a covered electric wire having such a configuration, when the covered electric wire is inserted into the insertion port, the end surface of the covered electric wire comes into contact with the insertion width restricting tool, and the covered electric wire cannot be inserted any further. The insertion width is fixed to a certain size. The covered electric wire whose insertion width is restricted in this manner is positioned in the radial direction by the chuck mechanism. The creasing mechanism and the sheath tearing mechanism act on the sheathed electric wire thus positioned. That is, a cut line in the axial direction is formed in the end coating of the coated electric wire positioned by the creasing mechanism, and the coating is torn from the cut line as a starting point and peeled in the axial direction. Then, in the creasing mechanism, the tip of the guide member hits the end coating before the cutting edge of the cutter blade pierces the end coating, and then the cutting edge is pierced into the end coating. Further, the tip of the guide member remains in contact with the end coating until the blade edge of the cutter blade is pulled out from the end coating, and the tip of the guide member ends after the blade edge is pulled out from the end coating. Leave the coating.

〔Example〕

FIG. 1 is a front view of an edge processing apparatus according to an embodiment of the present invention. In the figure, reference numeral 1 is a vertically arranged panel, and an insertion opening 2, an insertion width restricting tool not shown in the figure, a chuck mechanism 3, a creasing mechanism 4, and a covering tearing mechanism are provided in the panel 1. 5 and 5 are deployed. The chuck mechanism 3, the creasing mechanism 4, and the coating tearing mechanism 5 are arranged radially around the insertion port 2 and are provided at equal angles in this order. Although the number of each mechanism is four in the illustrated example, the number may be two, three, or more than four, and the diameter of the covered electric wire to be processed or It is appropriately determined in consideration of the tear strength of the coating.

FIG. 2 shows the insertion port 2 and the insertion width regulation tool 6. The insertion port 2 is formed by inserting a base 23 into a cylindrical support 22. The support 22 is supported by the panel 1 via a mounting member 21. Further, the base 23 is fixed to the support 22 by a fixing bolt 24 screwed into the support 22.
It is fixed to. As the base 23, one having an insertion hole 25 corresponding to the diameter of the covered electric wire C is used, and for the covered electric wire C having a different diameter, the base 23 having the insertion hole 25 having a corresponding diameter is used for the support 22. Be replaced.
The insertion width restricting tool 6 is composed of a shaft body provided at a concentric position spaced apart from the insertion opening 2. In this embodiment, the insertion width restricting tool 6 can be retracted between an advance position approaching the insertion port 2 and a retract position behind the advance position. In the figure, the solid line (a) shows the insertion width restricting tool 6 at the forward position, and the imaginary line (b) shows the insertion width restricting tool 6 at the retracted position. A known mechanism such as a cylinder or a cam mechanism is adopted as a mechanism for moving the insertion width restricting tool 6 back and forth.
Reference numeral 61 is a protective cylinder for the insertion width restricting tool 6, which is fixed to the panel 1.

When the covered electric wire C is inserted into the insertion port 2 as shown by an imaginary line in FIG. 2, the end face of the electric wire contacts the insertion width restricting tool 6, and the insertion width L of the covered electric wire C is determined.

The chuck mechanism 3 is provided with a push-out rod 32 that is pushed and pulled by the cylinder 31, a guide 33 of the push-and-pull rod 32, and a stopper mechanism 34 that regulates the protruding position of the push-pull rod 32. As shown in FIG. 3, the guide 33 is fixed to the panel 1, and the push-out rod 32 is slidably held by the guide 33. Further, the stopper mechanism 34 screws the bottom 36 into the nut-like member 35 fixed to the guide 33, while the push-out rod 3
A projecting piece 37 facing the shaft end of the bolt 36 is fixedly attached to 2.

The four chuck mechanisms 3 arranged at equal angles are operated in synchronization. That is, the push-out rods 32 ... Of all the chuck mechanisms 3 ... are simultaneously pushed out in a direction approaching the insertion port 2 at the same time, or simultaneously pulled in a direction away from the insertion port 2, and the push-out rods 32. When is pushed out, the fourth
As shown in the drawing, the tip end surfaces 321 of the rods 32 are brought into contact with a plurality of circumferential positions of the covered electric wire C inserted into the insertion port 2 to position the covered electric wire C in the radial direction. here,
If the tip end surface 321 of the push-out rod 32 is formed in a V-shaped groove as shown in FIG. 5, the covered electric wire C is securely held from the surroundings by the tip end faces 321 of the four push-out rods 32. There is an advantage that various positioning is possible. In order to position the coated electric wires C having different diameters, the bolt 36 of the stopper mechanism 34 is turned to adjust the stroke S of the push-out rod 32 shown in FIG. Set it at a position corresponding to the diameter of the electric wire C. A known mechanism is used as a mechanism for synchronizing the push-out rods 32 of the respective chuck mechanisms 3.

6a to 6c show the main part of the creasing mechanism 4. In these figures, 41 is a guide attached to the panel 1, and the movable member 42 is held by this guide 41.
The movable member 42 has a notched groove portion 421, and the base end portion of the strip-shaped cutter blade 43 inserted in the groove portion 421 is supported by the movable member 42 by a mounting pin 422.
The cutter blade 43 having such a configuration is held by the movable member 41 in a protruding state. Reference numeral 44 denotes a guide member held by the guide 41 at the front part of the movable member 42. The guide member 44 has a notch-shaped groove portion 441 extending in the longitudinal direction, and the cutter blade 43 is fitted in the groove portion 441 so as to be relatively slidable. Reference numeral 45 denotes a connecting member held by the guide 41 behind the movable member 42, and an engaging rod 423 extending rearward from the movable member 42 is engaged with an engaging groove 451 at the front end of the connecting member 45. There is. Further, one end of the chain 46 is attached to the protruding portion 452 protruding laterally of the connecting tool 45. The chain 46 is guided to the front of the projecting portion 452, and is connected to a cylinder (not shown) installed on the back of the panel 1 via a turning sprocket 461. The sprocket 461 is attached to the panel 1. Reference numeral 11 is an opening for inserting a chain formed in the panel 1, 411 is a long hole formed in the side wall of the guide 41, and the protrusion 452 can be moved back and forth along the long hole 411. There is. Further, one end of another chain 47 is attached to the rear end of the connector 45. This chain 47 is guided to the rear of the connector 45,
It is connected via a sprocket 471 for turning to a tension coil spring (not shown) provided at the back of the panel 1. The sprocket 471 is attached to the panel 1. 1
Reference numeral 2 is an opening formed in the panel 1 for inserting a chain.

6d and 6e are partial cross-sectional views of the movable member 42 holding the cutter blade 43 and the guide member 44 as seen from the back side. As shown in these drawings, the guide member 44 is provided with a shaft body 48 protruding rearward thereof, and the shaft body 48 is inserted into a through hole 424 formed in the movable member 42 in the front-rear direction. A flange 481 is provided at the tip of the shaft retreat 48. As shown in FIGS. 6a to 6e, an elastic member 49 such as a spring is interposed between the movable member 42 and the guide member 44, and the spring force of the elastic member 49 causes the guide member 44 to move.
Is always urged forward.

In the creasing mechanism 4 described with reference to FIGS. 6a to 6e, the panel 1
When a cylinder (not shown) installed at the back of the chain is operated to pull in the chain 46 from the state shown in FIG. 6a, the connector 45 is pulled by the chain 46 to move the movable member 42 forward, and the guide member 44 is also moved accordingly. It is pushed forward through the elastic member 49. Then, as shown in FIG. 6b, when the tip end 442 of the guide member 44 hits the covered electric wire C positioned by the chuck mechanism 3 (see FIGS. 1 and 4), the guide member 44 is no longer pushed out, After that, the movable member 420) moves forward while compressing the elastic member 49. Therefore, the cutting edge 431 of the cutter blade 43 projects from the tip portion 442 of the guide member 44, projects from the notch forming position set by the tip portion 442, and pierces the coating C ₁ of the coated electric wire C as shown in FIG. 6c. As a result, the covered electric wire C
The coating C ₁ has a constant width extending in the axial direction (the cutter blade 43
Cuts C ₂ of the width of the cutting edge 43) is reliably formed, the cutting edge 4
The loss of 31 is also prevented in advance. In addition,
While the movable member 42 is moving forward, the tension coil spring provided at the back of the panel 1 is stretched against the spring force, and the chuck 47 is extended from the opening 12 of the panel 1. The forward limit of the movable member 42 is determined by the stroke of the cylinder. Further, until the guide member 44 is pushed forward and its tip end 442 hits the covered electric wire C, the brim 481 is in contact with the movable member 42 by the spring force of the elastic member 49 as shown in FIG. 6d. Then, the tip portion 4 of the guide member 44
After 42 hits the covered electric wire C, the movable member 42 moves to the 6c
Move away from the collar 481 as shown.

After the cut C ₂ is formed in the covered electric wire C through the above steps, the operating pressure of the cylinder is released, and the tension coil spring is also contracted in the original state accordingly. Therefore, the chain 47 pulls the connector 45 to move the movable member 4
Retreat 2. As a result, the blade edge 43 of the cutter blade 43
1 is withdrawn from the coating C ₁ covered wire C. At this time,
Since the tip end portion 442 of the guide member 42 is still in contact with the covered electric wire C, the cutting edge 431 is covered with the covering C ₁ without difficulty.
Pulled out of. The cutting edge 431 of the cutter blade 43 is covered
When it is pulled out from C ₂ , the movable member 42 engages with the brim 481 and pulls the guide member 44 rearward, and accordingly, the tip end portion 442 of the guide member 44 separates from the covered electric wire C and returns to the original position.

As is clear from the above description, the creasing mechanism 4
Is cut in the coating C ₁ of the coated electric wire C by a series of operations from the state shown in Fig. 6a to the state shown in Fig. 6c through the state shown in Fig. 6b.
C ₂ is formed, and then the state of FIG. 6b is returned to the original state of FIG. 6a.

The four incision mechanisms 4 ... Arranged at equal angles are synchronously operated by a known mechanism. Therefore, as shown in FIG. 7, the respective cutting edges 431 of the four cutter blades 43 are simultaneously pierced into the coating C ₁ of the coated electric wire C positioned by the push-out rods 32 of the chuck mechanism 3.

FIG. 8 shows the coating tearing mechanism 5. In the figure,
Reference numeral 51 is a driving cylinder, which is attached to the rear surface of the panel 1 with a fixture 5
It is attached by 11,511. Cylinder 51
The end fitting 513 is fixed to the rod 512 of
The slide plate 52 is fixed to the tip fitting 513. Reference numeral 13 is a long hole formed in the panel 1, and the tip fitting 513 is inserted into the long hole 13. Slide plate 5
Reference numeral 2 is a structure guided by a guide 53. 54 is a claw portion 54 by opening and closing the handles 541, 541.
2, 542 is a clamp mechanism that is opened and closed. The clamp mechanism 54 is provided on the slide plate 52 by attaching a support shaft 543 that forms an opening / closing fulcrum of the handles 541 and 541 to the slide plate 52. The handles 541 and 541 are constantly urged in the opening direction by a spiral spring (not shown).
Therefore, the claw portions 542 and 542 are also constantly urged in the opening direction by the spiral spring. Reference numeral 55 is a cylinder, which is attached to the slide plate 52, and the tip fitting 551 and the handles 541 and 541 of the cylinder 56,
They are connected by 56. Further, the slide plate 52 is provided with a stopper mechanism 57. The stopper mechanism 57 is composed of a nut-shaped member 571 and a bolt 572 screwed into the nut-shaped member 571, and the tip of the bolt 572 faces the tip fitting 551. The stopper mechanism 57 has a role of restricting the pushing stroke of the cylinder 55.

In such a coating tearing mechanism 5, a clamping mechanism 54
When the cylinder 51 is pushed out from the state in which the claws 542 and 542 of the claws 542 and 542 are opened, the claws 542 and 542 are pressed against the covered electric wire C together with the slide plate 52 as shown in the imaginary line in FIG. 8 and in FIG. 9a. . At this time, the claw portion 542
The point where 542 abuts is the point between the cuts C ₂ of the coating C ₁ . When the cylinder 55 is pulled in from this state and the chains 56, 56 are pulled as shown by arrows A, A in FIG. 9b, the handles 541, 541 are biased in the closing direction, and the claws 542, 542 are closed accordingly. , The claws 542 and 542 hold the coating C ₁ . Then, the cylinder 51 is pulled in while the claws 542 and 542 are holding the cover C _1, and the clamp mechanism 54 is retracted together with the slide plate 52 as shown by an arrow B in FIG. 10, as shown in FIGS. 9 and 9b. As described above, the coating C ₁ of the coated electric wire C is torn from the cut C ₂ as a starting point, and is stripped straight or almost straight in the axial direction. Peeling width H at this time
Is determined by the time when the claw portion 542 is opened during the backward movement of the clamp mechanism 54 to release the holding state of the coating C ₁ . That is, if the holding state is released in the initial stage where the clamp mechanism 54 is retracted, the peeling width H is shortened, and the closer to the final stage the release state is, the closer it is to the timing of releasing the holding state. The peeling width H becomes longer. To release the holding state, the operating pressure of the cylinder 55 is released, and the handles 541 and 541 are opened by the force of the spiral spring.

FIG. 8 shows the control mechanism 7 that can arbitrarily specify the opening timing of the claw portions 542 and 542 described above. The control mechanism 7 includes a projecting piece 71 fixed to a rod 512 of a cylinder 51 and two limit switches 7 arranged at intervals in a path along which the projecting piece 71 moves when the cylinder 51 operates.
2, 73 and a screw mechanism 74 for moving the limit switch 72 arranged on the retracting side of the cylinder 51 along the path. In this control mechanism 7, when the movable limit switch 72 is kicked by the protrusion 71, the operating pressure of the cylinder 55 is released, and when the other limit switch 73 is kicked by the protrusion 71, the cylinder 55 is pulled in and the clamp The handles 541 and 541 and the claws 542 and 542 of the mechanism 54 are closed. The screw mechanism 74 has a movable shaft 745 holding the limit switch 72 screwed onto a screw shaft 743 supported by bearing members 741 and 742 fixed to the rear surface of the panel 1, and one end of the screw shaft 743. A handle 746 is provided.

In such a control mechanism, when the handle 746 is held by hand and the screw shaft 743 is rotated, the limit switch 72 moves together with the movable body 745 according to the rotation direction, and the mutual interval with the other limit switch 73 increases or decreases. Adjusted. For example, comparing the case where the limit switch 72 is provided at the position shown by the solid line in FIG. 8 with the case where it is set at the position shown by the imaginary line in FIG.
The timing at which the limit switch 72 is kicked by the projecting piece 71 at the time of pulling in 1 becomes slower when set to the position of the solid line than when set to the position of the imaginary line, and the operating pressure of the cylinder 55 is correspondingly increased. Will be released later. Therefore, the claws 542 and 542
Also, the opening timing is delayed, and the peeling width H shown in FIG. 10 becomes longer. In the figure, an arrow D indicates the pushing / pulling direction of the cylinder 51, an arrow E indicates the moving direction of the limit switch 72, T ₁ and T ₂ indicate the mutual distance between the limit switches 72 and 73, and T ₁ > T ₂ . .

In this embodiment, the covered electric wire C by the chuck mechanism 3
It is easy to continue each of the steps of positioning, scoring by the scoring mechanism 4 (formation of the cut C ₂ ) and peeling off the coating C ₁ by the coating tearing mechanism 5, and by doing so, the coated electric wire C It is possible to automate the edge treatment. In order to automate, the wire C is covered with the insertion port 2 for example.
The chucking mechanism 3 is activated upon detection of the insertion of the cord into the cable, and the creasing mechanism 4 is activated by detecting that the covered electric wire C has been positioned, that is, the operation of the chucking mechanism 3 has been completed. The cover tearing mechanism 5 may be activated by detecting that the notch C ₂ has been formed by the inserting mechanism 4, that is, the completion of the operation of the creasing mechanism 4. The operation start signal of each mechanism can be easily obtained by using a limit switch or a timer.

〔The invention's effect〕

According to the end treatment device for a coated electric wire of the present invention, it is possible to mechanically perform the work of peeling off the end coating, which has hitherto relied on manpower, and the work efficiency is significantly improved as compared with the prior art. . In addition, the end coating of the coated wire is stripped straight in the axial direction by the coating tearing mechanism starting from the axial notch formed by the creasing mechanism, so the conventional end that strips the coating spirally. There is little risk that the coating will be torn as in the processing apparatus, the finished state of the processed product is constant, and the frequency of occurrence of defective products is greatly reduced. Furthermore, it is possible to easily operate the chuck mechanism, the creasing mechanism, and the coating tearing mechanism in sequence at a predetermined timing. By doing so, the end treatment process of the coated electric wire is automated, and the worker can By simply inserting it into the insertion port, there is no need to perform any other troublesome work, and work efficiency is further improved.

In particular, in the present invention, when the blade edge of the cutter blade of the creasing mechanism pierces the coating of the coated electric wire and when the blade is pulled out of the coating, the blade tip is guided by the guide member, so that force is not applied unreasonably, so that the cut line Not only can be accurately formed, but damage to the cutting edge is prevented in advance.

[Brief description of drawings]

FIG. 1 is a front view of an end treatment device for a coated electric wire according to an embodiment of the present invention, FIG. 2 is a sectional view showing an insertion port and an insertion width regulating tool 6, and FIG. 3 is a part showing a chuck mechanism. FIG. 4 is a perspective view showing a state in which the covered electric wire is positioned by the chuck mechanism, FIG. 5 is a perspective view showing the tip shape of the protruding and retracting rod of the chuck mechanism, and FIGS. 6a to 6c show the creasing mechanism. Sectional view seen from the front side, FIGS. 6d and 6e are sectional views seen from the back side of the creasing mechanism, and FIG. 7 is an explanatory view showing a state in which cut lines are formed in the covered electric wire by the creasing mechanism. FIG. 8 is a sectional view showing the coating tearing mechanism and the control mechanism, FIGS. 9a and 9b are front views showing the action of the clamping mechanism, and FIG. 10 is a side view thereof. 2 ... insertion port, 3 ... chuck mechanism, 4 ... creasing mechanism, 5 ...
Coating tearing mechanism, 6 ... insertion width regulating tool, 42 ... movable member, 4
3 ... Cutter blade, 44 ... Guide member, 45 ... Coupling tool (component of push / pull mechanism), 46, 47 ... Chain (component of push / pull mechanism), 49 ... Elastic member, 423 ... Locking rod, 431 ...
The cutting edge of the cutter blade, 442 ... front end portion of the guide member, C ... covered wires, the coating of C ₁ ... covered wire, C ₂ ... cuts, L ... insertion width of the covered electric wire.

Claims (1)

[Claims] 1. An insertion port into which an end portion of a covered electric wire is inserted, and an insertion width restricting device which comes into contact with an end surface of the covered electric wire inserted into the insertion port to restrict an insertion width of the covered electric wire. A chuck mechanism that positions the covered electric wire by abutting it on multiple positions in the circumferential direction of the covered electric wire inserted into the insertion port, and a plurality of circumferential positions in the circumferential direction of the covering of the covered electric wire that are positioned by the chuck mechanism. A scoring mechanism that forms a cut, and a tear that is peeled in the axial direction while tearing the coating from the cut as a starting point by sandwiching between the cuts formed at multiple points of the coating and pulling outward The scoring mechanism includes a moving member that holds the cutter blade in a protruding state, and a moving position where the blade edge of the cutter blade sticks to the sheath of the covered electric wire and a retracted position where the blade edge is pulled out from the sheath. Is connected to a push-pull mechanism that reciprocates between the guide blade and a guide member that is slidable relative to the cutter blade on both sides of the cutter blade. The cutter blade is connected to the movable member in a movable state between a position protruding forward of the blade edge of the cutter blade and a position retracted rearward of the blade edge, and the tip of the guide member is provided between the movable member and the guide member. An end treatment device for a covered electric wire, wherein an elastic member that elastically urges in a direction projecting forward of the cutting edge is interposed.